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Composite anode structure and preparation method thereof, all-solid-state lithium battery cell and all-solid-state lithium battery

An all-solid-state lithium battery technology, which is applied in the manufacture of battery electrodes, lithium batteries, electrolyte batteries, etc., can solve the problems of low practical life and poor cycle performance of lithium batteries, so as to prolong the service life, promote stability and uniformity, Reduce the effect of volume changes

Inactive Publication Date: 2018-08-07
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0004] In order to overcome the shortcomings of poor cycle performance and low practical life of current lithium batteries, the invention provides an all-solid lithium battery cell, an all-solid lithium battery and a preparation method thereof

Method used

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  • Composite anode structure and preparation method thereof, all-solid-state lithium battery cell and all-solid-state lithium battery
  • Composite anode structure and preparation method thereof, all-solid-state lithium battery cell and all-solid-state lithium battery
  • Composite anode structure and preparation method thereof, all-solid-state lithium battery cell and all-solid-state lithium battery

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[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] see Figure 1A and Figure 1B , The first embodiment of the present invention provides a composite negative electrode structure 100, which includes a negative electrode layer 101 and a passivation film layer 102, and the passivation film layer 102 is formed on the surface of the negative electrode layer 101. The negative electrode layer 101 also includes a metal mesh skeleton 1011 and lithium metal 1012, and the lithium metal 1012 is composited in the metal mesh skeleton 1011 by hot pressing. The metal mesh skeleton 1011 mainly includes metals such as Cu and / or Ni; preferab...

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Abstract

The invention relates to the field of lithium batteries, in particular to a composite anode structure and a preparation method thereof, an all-solid-state lithium battery cell and an all-solid-state lithium battery. The composite anode structure comprises an anode layer and a passive coating layer formed on one surface of the anode layer; the anode layer comprises a metal mesh skeleton and lithiummetal composited into the metal mesh skeleton by means hot pressing; the all-solid-state lithium battery cell comprises the composite anode structure; the all-solid-state lithium battery comprises one or multiple all-solid-state lithium battery cells which are in series or parallel connection. According to the technical scheme, the all-solid-state lithium battery has the advantages of small volume change of lithium metal anodes and uniform electro-deposition in charging and discharging, forming of lithium dendrites can be suppressed effectively, and further cycle life and service life of theall-solid-state lithium battery can be prolonged effectively.

Description

【Technical field】 [0001] The invention relates to the field of lithium batteries, in particular to an all-solid-state lithium battery cell with a composite negative electrode structure, an all-solid-state lithium battery and a preparation method thereof. 【Background technique】 [0002] Since the advent of commercial lithium batteries in the 1990s, they have been widely used in 3C products, electric motorcycles, low-speed electric vehicles, and electric vehicles. [0003] However, the existing lithium battery has a large interface impedance and low energy density; at the same time, the volume of the existing lithium battery changes greatly during the charging and discharging process of the lithium metal negative electrode, thereby destroying the structure of the lithium battery; The uneven electrodeposition density during charging and discharging will cause the growth of lithium dendrites to further damage the structure of lithium batteries, thereby reducing the cycle perform...

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Application Information

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IPC IPC(8): H01M4/134H01M4/1395H01M10/052H01M10/058
CPCH01M4/134H01M4/1395H01M10/052H01M10/058Y02E60/10Y02P70/50
Inventor 向勇朱焱麟张晓琨
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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